The best things to do are control your nutrient levels (less feeding, RO/DI water) and make sure that your lighting isn't helping the bloom (lights could be older or the photo period is too long). Also, adding some extra current to keep detritus from building up on the rocks helps alot.
Using ROWAphos or Phosban in a fluidized reactor will help to control your phosphate levels and help control the algae for the long-term.
But if you're looking for critters to control the algae, my experience is that Lawnmower Blennies, Lettuce Nudibranchs, and Foxface Rabbitfish are the biggest consumers of hair algae.